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Turrboo has been given turboot.
- Today
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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
Glad you find a way to adjust the offset. With EL34 as CCS, +400V and offset close to zero, I believe 1.5K gives ~23mA and 1.0K gives ~34mA. -
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My son has two cats. He also plays bass guitar, and has a monster loudspeaker with a massive port on the bottom. You can guess the punchline. One of the cats went missing. After a search of the house and outdoors - no cat. Lots of weeping and wailing. Was the cat dead somewhere? It had actually made a nice warm nest in the loudspeaker wadding. Only discovered when my son fired up the amp and did some playing. Cat shot out of the port. Mystery solved.
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Another 2.5 hour treatise of Evangelion. I like this along with the other breakdown that I recently watched, they focus on different aspects and ultimately bring more understanding than either of them alone. Solidifying that the Anime kicks ass.
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Begone AI spam bot!
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No, as I believe he is SoCal, not NorCal, and His MicroCenter is Tustin, apparently
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Did you see Jay and/or his Two Centz?
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The Knuckledragger 3rd Memorial Slow Forum Post
Dusty Chalk replied to Knuckledragger's topic in Off Topic
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I'm closer to my favourite fish&chipster now, I should go back there. I miss a great fish&chips (oil so hot it flash fries the fish inside). The bulgogi is kind of bizarre for such a small place, but one of these days, I will try...nah. https://maps.app.goo.gl/ecRrPwnM6ToJyVxm9 Me, rn: sammich from Wegmans
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Finished 11th out of 44 drivers at my last autocross. Goal was top 15 so I’m happy. Turns out putting better tires on the car makes a big difference. Who could have guessed? You can brake harder, carry more speed, and get back on power earlier. These aren’t even that fast of a tire too!
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The Knuckledragger 3rd Memorial Slow Forum Post
mikeymad replied to Knuckledragger's topic in Off Topic
fin -
Quick update: it’s 6 AM here in California and I just wrapped up some late-night tweaking. Someone PM’d me earlier asking how I solved the offset and balance issue, and I can finally say: done. Offset is now around 0.3V and balance is about 0.2V. If anyone else is running into similar issues, here’s what worked for me: 1.CCS Set Resistor: I kept the CCS set resistor at 1.5k, which gives around 22–23mA static current. You can try lowering to 1k if you want around 25mA, but I found 1.5k sufficient. The more plate current you have, the higher the offset you will get. 2.Cathode Resistor: Changed from 3300Ω to 7k–7.5k. A larger cathode resistor gives you a deeper grid voltage. I could only find suitable 7k wirewound resistors on Mouser – they’re a bit bulky but still fit. Note: Larger values will increase the offset, so some trial and error is expected. 3. Grid Pot: I replaced the 10k pot with a 50k, which gave me a much wider range to trim both offset and balance. Final bias: around 24–25mA static current, Vgk ≈ -75V. Hopefully, this helps anyone else dialing in the Megatron XL and happy tweaking!😊
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Connie Francis died on July 16. RIP
- Last week
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The original is on the right... the left one is clearly a fake
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2sa1968 is in fact a PNP 900v. 2sc1968 is a 500mhz rf amplifier.
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When I was looking for 2SA1968, I also got PNP. I couldn't make a claim to the seller, because according to the Toshiba datasheet, there is such a version too. Model 1968, one for the whole world, n-p-n and p-n-p
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@skullguise https://www.theatlantic.com/newsletters/archive/2025/07/andrea-gibson-simple-poetry/683597/?gift=VVmQ8PJvtoygs0Ru1GQletrb4jh0We6UCkEki67Hjig&utm_source=copy-link&utm_medium=social&utm_campaign=share
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Arctic Monkeys - AM vinyl Forgot that I had this record. Not a bad song on it. Qobuz - 3 songs in. Enjoying so far.